Nervous System

Question 1

What is a sense organ

Answer 1

Senses things from internal environment

Question 2

Flight or fight

Answer 2

Important to animals to respond to their environment (finish this)

Question 3

The nervous system consists of

Answer 3

Brain and spinal cord

Question 4

Biological name for nerve

Answer 4

Neurons

Question 5

The CNS is linked to

Answer 5

Sense organs by neurons which form the peripheral nervous system

Question 6

What is a neurone

Answer 6

Specialised cells which are adapted to carry electrical impulses.

Question 7

Dendrite

Answer 7

Receives info and moves down into the axon

Question 8

Sensory neurones

Answer 8

Always connected to a sense organ. It goes along to the CNS.

Sense organ –> sensory neurone –> CNS –> motor neurone –> effector

Effector: (muscle/gland)

Question 9

Motor neurone

Answer 9

Moves down the motor neurone to the effector. An effector is either a muscle or a gland.

Question 10

Relay neurone:

Answer 10

Sense organ picks up info and goes up the sensory neurone and bypasses the CNS and then goes straight to the effector.

Prevent the body from harm

Question 11

Reflex actions

Answer 11

They are rapid, automatic responses of the nervous system which do not involve the brain (without concious thought)

Instead the signals pass directly from a sensory neurone.